I'm not sure what point you are making here. The VAR advised the referee to look again at the Sterling incident, and the decision was changed - correctly. The VAR didn't advise the referee that he had missed a foul on Bernardo. That is VAR's fault, not the referee's. The referee wasn't given the opportunity to look at his decision again.I thought the match referee was the game's ultimate arbiter. It is up to the VAR officials to advise the referee that he may have made a "clear and obvious" error in his decision making, and advise him to review his decision. It is purely up to the referee to either change his decision on their advice, or uphold his original decision.
Remember, VAR stands for Video Assistant Referee.